CHECK            6921 contrib/libtests/pngvalid.c             CHECK(red,X)
CHECK            6922 contrib/libtests/pngvalid.c             CHECK(red,Y)
CHECK            6923 contrib/libtests/pngvalid.c             CHECK(red,Z)
CHECK            6924 contrib/libtests/pngvalid.c             CHECK(green,X)
CHECK            6925 contrib/libtests/pngvalid.c             CHECK(green,Y)
CHECK            6926 contrib/libtests/pngvalid.c             CHECK(green,Z)
CHECK            6927 contrib/libtests/pngvalid.c             CHECK(blue,X)
CHECK            6928 contrib/libtests/pngvalid.c             CHECK(blue,Y)
CHECK            6929 contrib/libtests/pngvalid.c             CHECK(blue,Z)